pan_http2_alloc() failed when accessing websites during working hours

• Users can't access any websites.
• "HTTP2_Protocol_Error" are present in the web inspector console logs.
• The issue is not seen with few users. 
• The issue is present only when "Strip ALPN" is disabled

http2_process                              4        0 info      http2     pktproc   Number of http2 connection process
http2_stream_session_alloc                16        0 info      http2     pktproc   Number of http2 stream sessions allocated
http2_connection_window_update_sent        8        0 info      http2     pktproc   Number of http2 connection window updates sent
http2_rst_stream_recv                      4        0 info      http2     pktproc   Number of http2 RST_STREAM frames received
http2_connection_protocol_error            2        0 error     http2     pktproc   Number of http2 connections closed due to protocol violation
http2_stream_protocol_error                1        0 error     http2     pktproc   Number of http2 streams closed due to protocol violation
http2_connection_cant_write                1        0 warn      http2     pktproc   Number of http2 send frames dropped after GOAWAY is sent or received
http2_stream_map_alloc_failure             4        0 warn      http2     resource  Number of http2 stream map allocation failure
http2_header_inflate_failed                2        0 error     http2     pktproc   Number of http2 hpack inflate failures
http2_frame_drop_ingress                   2        0 info      http2     pktproc   Number of http2 frame dropped at ingress stage
http2_frame_drop_egress                    9        0 info      http2     pktproc   Number of http2 frame dropped at egress stage
http2_continuation_internal               42        0 info      http2     pktproc   Number of http2 continuation frames for CTD processing
http2_goaway_sent                          6        0 info      http2     pktproc   Number of http2 goaway frames sent
http2_rst_stream_sent                      1        0 info      http2     pktproc   Number of http2 rst_stream frames sent
http2_send_frame_queued                    6        0 info      http2     pktproc   Number of http2 send frames queued for order
http2_headers_frame_queued                42        0 info      http2     pktproc   Number of http2 send headers frames queued
http2_data_frame_queued                  143        1 info      http2     pktproc   Number of http2 send data frames queued

+0200 Error:  header_table_add(pan_hpack.c:365): pan_http2_alloc() failed
+0200 Error:  header_table_add(pan_hpack.c:365): pan_http2_alloc() failed

• Palo Alto PA-3400 Series Firewalls
• PAN-OS 10.2.2 and 10.2.3
• Decryption is enabled or url-proxy configured for displaying response pages for HTTPS requests

1. As a work around, Turn on "Strip-ALPN " in the decryption policy to stop the usage of HTTP2.
2. For permanent fix, upgrade the PAN-OS to 10.2.4, 11.0.1 or higher version. The issue has been addressed under PAN-206005